小编Man*_*han的帖子

我正在开发一个WPF应用程序,它下载一些大于100 MB的MSI文件.下载时,如果互联网断开连接,则必须从下载中断的位置恢复当前下载的文件.我使用WebClient和Cookies下载文件.如果互联网断开连接并再次连接,则不会恢复文件.我使用了以下代码.谁能建议我如何实现简历流程？

using (CookieAwareWebClient client = new CookieAwareWebClient())
{
        client.DownloadProgressChanged += WebClientDownloadProgressChanged;
   client.DownloadFileCompleted += new AsyncCompletedEventHandler(Client_DownloadFileCompleted);      
  client.DownloadFileAsync(url, fileName);
 }

static void WebClientDownloadProgressChanged(object sender, 
DownloadProgressChangedEventArgs e)
    {
        Console.WriteLine("Download status: {0}%.", e.ProgressPercentage);
        Console.WriteLine(e.BytesReceived.ToString());

    }

    static void Client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
    {
        Console.WriteLine("Download finished!");
    }       

}

public class CookieAwareWebClient : WebClient
{
    private readonly CookieContainer m_container = new CookieContainer();

    protected override WebRequest GetWebRequest(Uri address)
    {
        WebRequest request = base.GetWebRequest(address);
        HttpWebRequest webRequest = request as HttpWebRequest;
        if (webRequest != null)
        {
            webRequest.CookieContainer = m_container; …